Transverse Joint Design of Small–Medium-Span Fully Precast Steel–UHPC Lightweight Composite Bridge
Publication: Journal of Bridge Engineering
Volume 26, Issue 8
Abstract
Joints are always the key issue of the precast bridge structures for accelerated construction. In this paper, the transverse joint of a fully precast steel–UHPC lightweight composite bridge was proposed. Based on the first small–medium-span fully precast steel–UHPC lightweight composite bridge in China, the flexural test of the proposed T-shaped joint was conducted. The test result showed that no apparent crack can be seen in the middle of the specimen, and the successively poured joint interface was the weak link of the design. The equations of the joint interface maximum crack width and the ultimate bearing capacity were presented through theoretical analysis, and the prediction and the experimental results were generally consistent. The length of the proposed T-shaped joint upper part was discussed with the spans of 20–50 m, and the value of 0.1L was finally determined.
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Acknowledgments
The authors gratefully acknowledge the support from the National Key R&D Program (Grant No. 2018YFC0705400), the National Natural Science Foundation of China (Grant No. 51778223), and the Major Program of Science and Technology of Hunan Province (Grant No. 2017SK1010). The authors also express their sincere appreciation to the reviewers of this paper for their constructive comments and suggestions.
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© 2021 American Society of Civil Engineers.
History
Received: Oct 25, 2020
Accepted: Mar 17, 2021
Published online: May 26, 2021
Published in print: Aug 1, 2021
Discussion open until: Oct 26, 2021
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